* Sample SAS Program   "procfreq.sas" ;

/* DESCRIPTIVE STATISTICS:       */
/* Producing FREQuency Tables    */
/*  - Ommiting cumulative Stats  */
/* Producing Crosstabulations    */
/*  - Ommiting column and row 
       percentages               */
/* Producing N-Way Tables        */
/* Selecting observations with PROC FREQ */
/* (See note 1 below.)           */


              /* GLOBAL STATEMENTS */
libname sas3 '[drive]:\[your_folder\]';
  options ls=75;
  title;
  footnote;


         /* PRODUCING FREQUENCY TABLES */
proc freq data=sas3.htwt2;
  tables age;
run;


         /* PRODUCING FREQUENCY TABLES */
         /* OMITTING CUMULATIVE STATS */
proc freq data=sas3.htwt2;
  tables age / nocum;
run;


          /* PRODUCING CROSSTABS */
proc freq data=sas3.htwt2;
  tables sex*age;
run;


         /* PRODUCING CROSSTABS */
         /* OMITTING COLUMN AND ROW PERCENTAGES */
proc freq data=sas3.htwt2;
  tables sex*age / nocol norow;
run;


         /* CREATING N-WAY TABLES */
proc freq data=sas3.htwt2;
   tables sex*age*height / nocol norow;
run;


         /* COMBINING DATA AND PROC STEPS */
data temp;
  set sas3.htwt2;
  if height<74 then height2='average';
  else height2='tall';
  if age<40 then age2='group1';
  else age2='group2';
run;
proc freq data=temp;
  tables sex*age2*height2;
run;


       /* SELECTING OBSERVATIONS WITH PROC FREQ */
proc freq data=sas3.htwt2;
 where sex='F';
 tables height*weight / nocol norow;
 footnote 'Females Only';
run;


       /* SELECTING OBSERVATIONS WITH PROC FREQ */
       /* USING TEMP DATA SET FROM EARLIER DATA STEP */
proc freq data=temp;
 where sex='M';
 tables height2*age2;
 title 'Males Only';
 footnote;
run;


/*-----------------------------------------------*/
/* NOTES:                                        */
/* 1. SAS provides a number of procedures for    */
/*    generating descriptive statistics for      */
/*    SAS Data Sets, including Proc Tabulate,    */
/*    Proc Means, Proc Summary and Proc Freq.    */
/*    Each of these procedures produces some     */
/*    of the same statistics, while each has     */
/*    its own unique options as well as its      */
/*    own style of output.  For more             */
/*    information on each of these procedures    */
/*    refer to the SAS Procedures Guide,         */
/*    Version 6.                                 */
/*-----------------------------------------------*/